Hi,

I have an OPS with at moment space for 80 Buildings :
http://prntscr.com/qb1smw

As you can see it indicates that i ahve occupied 79 from these 80.

Now a picture from my Buildings on the OPS :
http://prntscr.com/qb1t1o

When i count now my Buildings:
Robot factory: 13
Shipyard: 10
Nanite factory: 6
Gravity Gun: 5
Alliance Depot: 1
Missile silo: 6
Alliance Station: 1
Insectoid Entinity: 6
Lunar Base 10 (but doesnt occupied space) so 0
Neural Core :1
Ruby arttefact 3 (but doesnt occupied space) so 0
Incubator 1
Metal Storage 8
Mineral Storage 8
Vespene Storage 7
Psi Disruptor 1
Reasearch Lab 1

Counting all these building:13+10+6+5+1+6+1+6+0+1+0+1+8+8+7+1+1=75 occupied space instead of 79 I dont know why but it shows me 4 more occupied spece for nothing. Since space on OPS is very expensive i would like to get them back please =)
Thank you

Sincerly Darts

Robot factory      13
Shipyard             10
Nanite factory       6
Gravity Gun          5
Alliance Depot       1
Missile silo            6
Alliance Station     1
Insectoid Entinity  0
Lunar Base         10
Neural Core          1
Incubator             1
Metal Storage       8
Mineral Storage    8
Vespene Storage  7
Psi Disruptor        1
Reasearch Lab     1
Total                 79

It is not a bug.