so is this a wallet bug?

There are two transactions from the wallet, trying to send 5 coins, but both transactions sent 5, then 174, under the same transaction.

Status: 672 confirmations
Date: 7/22/2017 23:50
To: BKLMfyYb5hYSY7wjxKKdf38y9CfaEoFNYx
Debit: -5.00 SIGT
To: BKLMfyYb5hYSY7wjxKKdf38y9CfaEoFNYx
Debit: -174.80555279 SIGT
Transaction fee: -0.0001 SIGT
Net amount: -179.80565279 SIGT
Transaction ID: 571b02e85d14a91115f8160cd7820e98fc209fb6d34b2901f07e0cd6cc70ec6f-000


Then the next transaction, at 23:50, same minute, the wallet debits 5 again...
Status: 670 confirmations
Date: 7/22/2017 23:50
To: BKLMfyYb5hYSY7wjxKKdf38y9CfaEoFNYx
Debit: -5.00 SIGT
To: BKLMfyYb5hYSY7wjxKKdf38y9CfaEoFNYx
Debit: -174.80555279 SIGT
Transaction fee: -0.0001 SIGT
Net amount: -179.80565279 SIGT
Transaction ID: 571b02e85d14a91115f8160cd7820e98fc209fb6d34b2901f07e0cd6cc70ec6f-001

and now the wallet shows zero...

http://explorer.signatum.io/address/BSG9tDJLWxbE3mo4VqgqGT37Y5gBskseHg

why did it do that?