Broken inline if with define assignment

[kkevinm]

I've noticed what seems to be weird behavior when using multiple inline ifs in a row to check if a define is equal to a series of values. Two examples:

!a = 1
!b = -1

if !a == 0 : !b = 0 : endif
if !a == 2 : !b = 2 : endif

print "!b"

This prints 2.

!a = 1
!b = -1

if !a == 0 : !b = 0 : endif
if !a == 1 : !b = 1 : endif
if !a == 2 : !b = 2 : endif

print "!b"

This also prints 2.

It seems like all the !b assignments are executed?