I put in 7 orders for ICO this morning because max buy per transaction is only 300.

First order went through, but the other 6 were pending then 8 hours later are cancelled.??   Also my ETH is missing too

HISTORY
NO   ORDER   TOKENS   ORDER DATE   STATE
1   2149   80   2017-12-27   Cancel
1   2116   120   2017-12-27   Cancel
1   2026   300   2017-12-27   Cancel
1   1996   280   2017-12-27   Cancel
1   1953   300   2017-12-27   Cancel
1   1796   260   2017-12-27   Cancel
1   1583   300   2017-12-27   Success


Can DEV explain