Thanks for the IRs!
As a suggestion for the next time (or if you still have the sinsweeps), you should not cut the IRs' tail that short. A good starting point, imho, is 2048 samples, which means:
(1/sample rate)*2048;
so, if you recorded at 44100:
(1/44100) * 2048 = 0,0464 sec
Using 0,0464s as your total IRs' length, is supposed to give you high accuracy without "phasing/flangey/reverb" issues.
If you still hear tail related weird sounds, try 1536 or 1024 samples.
I suggest you to never use less than 1024 samples, or the IR could start to sound a bit too different from the real cab., expecially on the lows and high frequencies...
I was making this same mistake too, with my IRs
Hope it helps