When I put up certain shields that have more than one
effect, and it shows up twice in affects, and I get dispelled,
sometimes only one of the effects remains. Often times
I can't re-shield because it says I'm already surrounded
by that type of shield, so I have to cancel the other shield
in order to replace it.

A bug... or not a bug?

For now, this is by design. Somewhere down on The List is an attempt to make dispel & dispel magic either totally dispel an affect, or not, but the code is convoluted, and it hasn't been a high priority.

So long, and thanks for all the fish!