It's a tangled mess and here is more to add to the confusion. I would suggest that in many cases, orders seem to have been back dated.

I find no records of Carlo Patti with the 154th Sr. Tennessee Infantry. This was a pre-war milita unit from the Memphis area. Perhaps he had served pre-war.

The 154th Tennessee Militia Regiment was a pre-war organization, dating back to 1842, when it was first organized, and assigned the Tennessee Militia number 154. It held on to its designation, and when the old militia system was dropped in 1859-60, the officers and men took out a charter of incorporation, being incorporated by act of the Legislature on March 22, 1860. As soon as war was declared, the regiment reorganized at Randolph, Shelby County, and retained the old number. Since it was known as the oldest of the old, it asked for, and received permission to add the appellation "Senior" to its regimental number, to indicate that it antedated the regiments with lower numbers. [http://www.tngennet.org/civilwar/csainf/csa154.html]

George

Thomas H. Clagett, Jr

Residence was not listed;
Enlisted on 4/22/1861 at Leesburg, Va as a Private.
On 4/22/1861 he mustered into "C" Co. VA 17th Infantry
(date and method of discharge not given)
He was listed as:
* Detailed 7/15/1861 (place not stated) (With Capt Alexanders signal service)
* Returned 4/15/1862 (place not stated) (Estimated day)
* On rolls 9/15/1862 Mobile, AL
* Returned 9/15/1864 (place not stated) (Estimated day)
* Paroled 5/11/1865 (place not stated)
Promotions:
* Capt 5/29/1862 (As of Signal Corps)
Other Information:
Buried: Union Cemetery, Leesburg, VA
(Born 1839. Died 1881)
Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series

From his Compiled Service Records with the 17th Virginia

Card No. 14 of his file records: Clagett, J. H. Pvt., Co. C 17th Regt. Va. Vo1, , Subject: Relieved duty, report to Regt., Title of record: S. O. 74/5 Westtern Dept. 2 - Beauregard, Date: June 6, 1862 This record contains information relative to the above named man, upon the subject stated. (Confederate) Regt. Va. Vol.

Card No. 17 is a hand written letter: Baldwin Miss. June 4, ????, The undersigned respectfully request to be ordered to report to his regt in Virginia, /s/ T. H. Clagett, (Signal Operator), Co. C, 17th Regt Va Vols, Approved Cap. ???? & Signal Officer [signature cut off]

Found in his Signal Corps files are these War Department Notes:

April 22,1861. Thos. H. Clagett, Jr., private in Co. C, 17th Va. Inf., enrolled at Leesburg, Va.; rejected May 23, 1861, b mustering Co. on detached service (signal) from July 10, 1861, to his promotion to Capt. in Signal Corps, July 24 ?, 1862.

April 7, 1862. Island No. 10. Lt Col. Cook, 12th Ark. Inf., mentions Mr. Clagett, of the Signal Corps [Indexed Thomas H.] Capt. Clagett refers to men detailed at Cornith, Miss., for signal service. Indicates that he had served in that vicinity.

May 22, 1862. Thos. H. Clagett appointed, from Va., Sig. Officer, with rank of Capt. of Inf.; to rank same date; to report to Gen. Beauregard.

Sept. (?) 1862. Assigned to duty at Mobile. Capt. Clagett says "When [I was] assigned to duty here, nearly twenty months ago." (A. & I.C. G. -660-C, March 14, 1864.)

The last card (127) in his file:

Claggett, Thomas, Capt. Signal Cps., Subject: Proceed to Mobile., Title of Record: S. O. 159/5 Dept. 2 & Western Dept--Bragg, Date: Aug 21, 1862. This record contains information relative to the above named man, upon the subject stated. (Confederate)
.........

Carlo Patti, age 22/25, enlisted as a Private in Captain John G. Anderson's Company, 2nd Regiment Tennessee Volunteers** (Murry Rifles) April 27,1861 at Columbia, Tn/May 1, 1861 in Maury County, Tennessee, present May 17, 1861 at Lynchburg, Va., the Nov/Dec 1861 muster records his reenlistment for 2 years receiving $50 bounty, present on February 14, 1862 muster at the Evansport Ship Point Batteries*** No.1, Virginia muster, detached in signal corps prior to July 1, 1862, paid for the months of December, 1862, January/February 1863 as a Sergeant (Lance), Signal Corps., Signal Operator, Mobile, Alabama, deserted November 1863, "in Boston, Mass.," "last heard of giving concerts ord Genl Cleburne"

**This company subsequently became Company B, 2nd (Robison's) Regiment Tennessee Infantry

***This company had been on detached service since October 1,1861 to take charge of guns in Battery No. 1 Evansport, Va.

Sergeant C. Patti detailed April 27,1862 with Captain T. H. Clagett's Signal Corps in the District of the Gulf stationed at Mobile, Alabama, present on June 30, 1863 muster, transferred from Co. B, 2nd Regiment, Tennessee

There are no records showing him with the 154th Senior Tennessee Infantry