In the past, before Test server patches were posted we would see patched of the sort:
1750
1754
1830
1830a
1850
Update #1
etc (made them up obviously)
The 'a' patch was because a little update was done and I find that sensible, especially if it is, as I believe it was, a server side patch - but just a way of letting us know it happened. I recall seeing one of these in the past.
Now tho, we have patch 1780C. I recall seeing patches 'lettered' on these forums to indicate interim test patches.
My suggestion is that we continue to limit the 'official' patches to numbers and avoid this letter thing. Conceivably, a long test period with many interim fixes between released patches (perhaps a business decision to reduce patches or make them biweekly etc) may result in patch 1922X and then 1922AA, 1922AB...etc
Maybe, if we did something like use the last patch (1780) as the 'starting point' for numbering and the first POST-RELEASE patch would be:
1780.1 then 1780.2 ... 1780.3045 (/shiver) etc
When it comes time to release, 1780.4 (all 3045 jokes aside ;P) would become:
1781
On the Test Server forums it could be noted that 1780.4->1781 (if that matters) Those NOT playing on Test need not know 'A' 'C' etc - it isn't important. It can on the other hand imply that there were 3 patches that day and Sigil just kept editing the notes.
Which leads me to my second and last point: This above confusion is believable because the last patch notes were a jumble compared to most prior ones, when INITIALLY posted (officially) because they combined some of 78's issues as well - probably a bleedover from Test Server Patch note copy and pastes.
Ex:
- Aggro NPCs that can see invis will now attack if you move near them.
- Aggro NPCs that cannot see invis will no longer attack if you move very close to them.
Was on 1780 and the prior one - many more dupes were sxcattered through out - I had deja vu and confusion
Btw - you should have included a comment that umm the lvl 11 (Blacksmith at min) Tier quest were fixed

I was told they work now - I heard they broke after Update #1.
Great job on the fixes all! Thanks!
---Sigurd